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<p>The paper presents the results of a study on the effect of catalytic hydrogen oxidation on heat transfer in an impinging jet under chemical activity on the sample surface. It is shown that with an increase in the percentage of hydrogen in the mixture with air, not only an increase in the heat transfer intensity is observed, but also the reaction zone expansion. Additionally, it is also noted that in the case of a chemically active jet, temperature pulsations (approximately 6 %), associated with the reactions of hydrogen catalytic oxidation, occur on the surface. At that, the form of generalized distribution of the temperature function along the surface radius remains almost the same for all cases involving heterogeneous chemical reactions. The exception is the case with 2 % molar hydrogen content in the jet, if there are regions with heat release from reactions lower than the convective heat transfer at a non-reacting flow.</p>

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Hydrodynamics and heat transfer of a laminar jet impinging on a catalytic surface

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • V. V. Lukashov,
  • V. V. Lemanov,
  • A. V. Tupikin,
  • V. A. Fedorenko,
  • K. A. Sharov

摘要

The paper presents the results of a study on the effect of catalytic hydrogen oxidation on heat transfer in an impinging jet under chemical activity on the sample surface. It is shown that with an increase in the percentage of hydrogen in the mixture with air, not only an increase in the heat transfer intensity is observed, but also the reaction zone expansion. Additionally, it is also noted that in the case of a chemically active jet, temperature pulsations (approximately 6 %), associated with the reactions of hydrogen catalytic oxidation, occur on the surface. At that, the form of generalized distribution of the temperature function along the surface radius remains almost the same for all cases involving heterogeneous chemical reactions. The exception is the case with 2 % molar hydrogen content in the jet, if there are regions with heat release from reactions lower than the convective heat transfer at a non-reacting flow.